Resultats globals: 9 registres trobats en 0.05 segons.
Articles, 9 registres trobats
Articles 9 registres trobats  
1.
11 p, 634.0 KB Non-existence and uniqueness of limit cycles in a class of generalized Liénard equations / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Valls, Clàudia 1973- (Universidade de Lisboa. Instituto Superior Técnico. Departamento de Matemàtica)
We provide a sharp upper bound for the number of limit cycles of the generalized Liénard differential systems x˙ = y + axn + bxk, y˙ = cxm where n, k, m are positive integers, 1 < n< k and a, b, c∈ R with bc≠ 0. [...]
2022 - 10.1007/s40590-022-00433-8
Boletin de la Sociedad Matematica Mexicana, Vol. 28, Issue 2 (July 2022) , art. 41  
2.
Global centers of the generalized polynomial Liénard differential systems / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Valls, Clàudia 1973- (Universidade de Lisboa. Instituto Superior Técnico. Departamento de Matemàtica)
The global centers started to be studied seriously at the end of the XX century. In the last decades, the generalized polynomial Liénard differential systems have been studied intensively. In this paper we characterize all the generalized polynomial Liénard differential systems having a global center at the origin. [...]
2022 - 10.1016/j.jde.2022.05.013
Journal of differential equations, Vol. 330 (September 2022) , p. 66-80  
3.
16 p, 463.4 KB Hilbert's sixteenth problem for polynomial Liénard equations / Caubergh, Magdalena (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
This article reports on the survey talk 'Hilbert's Sixteenth Problem for Liénard equations,' given by the author at the Oberwolfach Mini-Workshop 'Algebraic and Analytic Techniques for Polynomial Vector Fields. [...]
2012 - 10.1007/s12346-012-0068-y
Qualitative theory of dynamical systems, Vol. 11, Issue 1 (April 2012) , p. 3-18  
4.
7 p, 731.3 KB On the Integrability of Liénard systems with a strong saddle / Giné, Jaume (Universitat de Lleida. Departament de Matemàtica) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We study the local analytic integrability for real Li\'enard systems, x=y-F(x), y= x, with F(0)=0 but F'(0)0, which implies that it has a strong saddle at the origin. First we prove that this problem is equivalent to study the local analytic integrability of the [p:-q] resonant saddles. [...]
2017 - 10.1016/j.aml.2017.03.004
Applied mathematics letters, Vol. 70 (2017) , p. 39-45  
5.
7 p, 267.6 KB Integrability of Liénard systems with a weak saddle / Gasull, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Giné, Jaume (Universitat de Lleida. Departament de Matemàtica)
We characterize the local analytic integrability of weak saddles for complex Liénard systems.
2017 - 10.1007/s00033-016-0756-6
ZAMP. Journal of Applied Mathematics and Physics, Vol. 68 Núm. 13 (2017)  
6.
21 p, 458.8 KB Existence and uniqueness of limit cycles for generalized -Laplacian Liénard equations / Pérez-González, Set (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Torregrosa, Joan (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Torres, Pedro J. (Universidad de Granada. Departamento de Matemática Aplicada)
The Liénard equation x'' + f(x)x' + g(x) = 0 appears as a model in many problems of science and engineering. Since the first half of the 20th century, many papers have appeared providing existence and uniqueness conditions for limit cycles of Li'enard equations. [...]
2016 - 10.1016/j.jmaa.2016.03.004
Journal of mathematical analysis and applications, Vol. 439 (2016) , p. 745-765  
7.
13 p, 1.9 MB On the 16-Hilbert Problem / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Presentamos un breve resumen de algunos resultados recientes sobre la segunda parte del problema 16 de Hilbert, poniendo un especial énfasis en los ciclos límite algebraicos.
We present a brief survey of recent results on the second part of the 16-th Hilbert problem. We put special emphasis in the algebraic limit cycles.

2015
La Gaceta de la Real Sociedad Matemática Española, Vol. 18, Núm. 3 (2015) , p. 543-554  
8.
16 p, 714.6 KB Limit cycles of generalized Liénard polynomial differential systems via averaging theory / García, Belen (Universidad de Oviedo. Departamento de Matemáticas) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Suárez Pérez del Río, Jesús (Universidad de Oviedo. Departamento de Matemáticas)
Using the averaging theory of first and second order we study the maximum number of limit cycles of the polynomial differential systems x˙ = y, y˙ = −x − ε(p1(x)y + q1(x)y2) − ε2(p2(x)y + q2(x)y2). [...]
2014 - 10.1016/j.chaos.2014.02.008
Chaos, solitons and fractals, Vol. 62-63 (2014) , p. 1-9  
9.
22 p, 370.2 KB Uniqueness of Limit Cycle For Liénard differential Equations of Degree Four / Li, Chengzhi (Peking University. School of Mathematical Sciences and LMAM) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We prove that any classical Liénard differential equation of degree four has at most one limit cycle, and the limit cycle is hyperbolic if it exists. This result gives a positive answer to the conjecture by A. [...]
2012 - 10.1016/j.jde.2011.11.002
Journal of differential equations, Vol. 252 (2012) , p. 3142-3162  

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